Cornell offers the last obstacle in the Virginia polo club's bid for an undefeated spring season. The Cavaliers presently hold a 5-0 record and will face the "Big Red" at Brook Hill Farm for the last home contest Sunday afternoon. On the following Sunday the polo team will play Farmington at the country club, but this match will not be regarded as inter-collegiate competition. Only a 17-16 loss to Yale in the winter finale keeps Cornell from the top national ranking. Game time is 2 p.m. Sunday.